From 58ac7fb9c395ab91cb321fa4c8c9e127ce8147c3 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 18 May 2017 01:54:43 +0200 Subject: avcodec/dfa: Fix: runtime error: signed integer overflow: -14202 * 196877 cannot be represented in type 'int' Fixes: 1657/clusterfuzz-testcase-minimized-4710000079405056 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/dfa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'libavcodec/dfa.c') diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c index 3ea12f0511..8067ac94e5 100644 --- a/libavcodec/dfa.c +++ b/libavcodec/dfa.c @@ -250,7 +250,7 @@ static int decode_wdlt(GetByteContext *gb, uint8_t *frame, int width, int height segments = bytestream2_get_le16u(gb); while ((segments & 0xC000) == 0xC000) { unsigned skip_lines = -(int16_t)segments; - unsigned delta = -((int16_t)segments * width); + int64_t delta = -((int16_t)segments * (int64_t)width); if (frame_end - frame <= delta || y + lines + skip_lines > height) return AVERROR_INVALIDDATA; frame += delta; -- cgit v1.2.3